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There's a new royal wedding in the works, and it combined our two favorite types of royals - fashion royalty and crowned prince royalty.

Good thing Kate Middleton is a wee bit distracted at the moment. Her ceremony is apt to look quaint when compared to that of Andrea Casiraghi, grandson of Grace Kelly, son of Princess Grace of Monaco and heir to the Monegasque throne and Tatiana Santo Domingo, Colombian billionairess and sister-in-law of American Vogue It Girl Lauren Santo Domingo.*

"The wedding will occur on Aug. 31," a Monaco spokesperson told People. "It will be a private ceremony."

What can we expect? Well, Lauren and Andrés Santo Domingo's wedding in 2008 was given a 10-page spread in Vogue, each bridesmaid wore a dress by a different major designer, and Lauren herself wore two different gowns by Olivier Theyskens for Nina Ricci. And there wasn't even anyone in line to a throne involved!

When Tatiana marries Andrea Casiraghi there will be all those trappings of billionaire excess, actual royal protocol and even a sister-in-law-to-be, Charlotte Casiraghi, who is the face of Gucci. (Hmm, does this give a tip off to the bridesmaid or even wedding dress designer?)

All this pomp and circumstance will be par for the course for the couple, who have already attended high-profile Monaco events such as the Rose Ball, the Red Cross Ball, the Monaco Grand Prix and the wedding of Prince Albert and Charlene Wittstock. The two also welcomed a child, a son, this past spring.

Luminaries expected to be in attendance include Eugenie Niarchos, Gaia Repossi, Dana Alikhani, and Teresa and Margherita Missoni.

* In no way do we actually think Kate Middleton would be jealous of any one else's wedding, or even care about it. K-Midd 4EVA!